[phaz0n]

My favorite OS is probably Gentoo GNU/Linux.
I know it's sort of a meme distro but it runs extremely fast (being source-based and using a manually configured and compiled kernel) and being able to configure absolutely everything makes me really happy in an autistic sort of way.
Been using it as my daily driver for 8 months now, and it has basically everything I need for development as well as entertainment.
As a side benefit it helped me kill the obsessive gaming habit.